Bitcoin Cash will have a hardfork on Nov 15th. This could be one of the reasons.
The other reason is surely the announcement by Binance regarding the fork:

“Binance would like to confirm support for the upcoming Bitcoin Cash hard fork. We will take a snapshot of all Bitcoin Cash balances at UNIX time 1542300000, 2018/11/15 4:40:00 PM (UTC). Deposits and withdrawals of Bitcoin Cash will be suspended starting from 2018/11/15 3:00:00 PM (UTC). “

Source: https://ambcrypto.com/bitcoin-cash-bch-takes-a-massive-hike-of-close-to-10-as-it-nears-the-hard-fork/